Clock



Jan. 26, 1960 o. BRAITSCH ETAL CLOCK Filed Dec. 10, 1956 2 Sheets-Sheet 1 INVENTORJ' Otto Bradlscll. 4 H8718 6212:7241- Jan. 26, 1960 o. BRAITSCH EI'AL 2,922,276

CLOCK Filed Dec. 10, 1956 2 Sheets-Sheet 2 INVENTORJ Otto Brain-cl.

Hans 62L Zen ker- Hornex;

United States Patent 4 O CLOCK Otto Braitsch and Hans Schlenlter, Sclrramberg, Germany Application December 10, 1956, Serial No. 627,444 Claims priority, application Germany December 9, 1955 1 Claim. (CI. 58-41) This invention relates to a clock having a movement driven by a spring, in which the main spring is wound by an electromagnetically actuated fiyweight constructed as alever.

The invention is characterised in that the clock movement is arranged on a dished member of synthetic material, that the'dished member has seating surfaces for the electromagnet serving for the impulse of the fiyweight that the rim of the dished member provides a seating for a casing;which is closed in dust-tight manner and which preferably consists of transparent plastic, and that arms serving as a holder for the dry battery to be used and at the same time for the supply of current are led through the wall of the dish-shaped member.

The spiral pointer by which the running of the clock can be regulated preferably extends outwardly through a slot between the rim portion of the dished member and the rim portion of the protective casing which closes in dust-tight manner, so that the said pointer can be actuated from outside.

For operating the clock, it is expedient to use a flashlight battery which is supported horizontally beneath the dish-shaped plastic member between plate-shaped shoulder surfaces of the outwardly extending current conductors.

One constructional example of the invention is shown in four figures, wherein:

Fig. 1 is a section through a clock with a fitted protective casing, taken on the line A--A in Fig. 2,

Fig. 2 is a rear elevation of the clock;

Fig. 3 is a sectional view corresponding to Fig. 1 showing the housing and the protective casing on the line B-B of Fig. 4.

Fig. 4 is a rear view corresponding to Fig. 3 of the housing with the protective casing removed;

The references used in the figures have the following significance; 1 is a dished member of a synthetic material and serving as the base plate for the following groups of components;

(1) The clock movement with the fiyweight 5, constructed as a double-armed lever, which fiyweight is given electro-magnetic impulses and efiects the winding of the main spring driving the clock movement.

(2) The electromagnet which imparts impulses in a manner known per se to the said fiyweight at suitable time intervals and supplies the said weight with the energy which is necessary for winding the main spring.

(3) The arms 21 serving as holding means and current supply means for the dry battery 20 to be used for feeding the said electromagnet.

A protective casing 2, preferably consisting of transparent synthetic material, is fitted in dust-tight manner on the rim 1a of the dished member 1. In order to ensure a dust-tight closure, a rubber packing cord 3 is inlaid in the rim 1a of the dished member 1. The protective 1 by means of casing 2 is fixed to the dished member screws 4.

2,922,276 Patented Jan. 26, 1960 The clock movement comprises the front plate 6 and the rear plate 7; they are held in spaced relation to one another by posts 8. 9 is the balance wheel and 10 is the pointer serving for regulating the running.

The protective casing 2 and the dished member 1 are provided at the upper part of the clock with two projecting lugs 1b and 20 respectively which form a slot into which the pointed end of the pointer 10 projects. If a thin article, such as a screwdriver or a coin, is introduced into the slot, the pointer 10 can be actuated from outside. In order also to ensure dust-tight closure at this point, the pointer 10 has arranged thereon a dust plate 11 which is under the pressure of a spring 12. The pointer 10 has a longitudinal slot 14 which forms a part of a pin-and-slot connection and actuate: an indicator 13. The front plate 6 is fixed to the dished member 1 by means of screws 15. A bridge 16 is fixed by means of posts 17 and 18 on the rear plate 7. The bridge 16 serves for the mounting of the fiyweight 5. The pointer 10 is at the same time mounted with slight friction by means of a bushing 19 on the central post 17. The pointer 10 functions to permit adjustment of a balance of the clock movement to thereby adjust the latter.

Two arms 21, which pass at 21a through slits provided in the marginal portion of the base plate 1 and are fixed by means of screws 22 to the dished member 1 and extend through the side wall thereof serve as holding means for a dry battery 20 and at the same time as conductors.

Serving for the supply of current, as shown in Figs. 1 and 2 is the flashlight battery 20 of elongated crosssection and having three juxtaposed battery cells of con- For this case, the supporting arms 21 terminate in screw terminals 23 into which are fitted the contact blades of the battery 20.

Figs. 3 and 4 provide for the use of a single flashlight battery 51 which is arranged horizontally beneath the cloclt. Instead of this the flashlight battery, the current supply arms indicated at 50 pass at 59" through slits provided in the marginal POIilOIIS of the vase plate like parts 50a which bear flashlight battery and in this fiyweight 5 and sets the The coil 26 of the electromagnet is manner known per se to the circuit of the end surfaces of the projections 28a the controlling contact path.

As will be seen from Figs. 3 and 4, the dished member 1 is formed with a bore latter in motion.

connected in a the dry battery,

recess is formed upper edge of the dished member 1, the

emanate We claim:

A clock housing comprising a base plate in the form of a dished member consisting of a plastic synthetic ma terial and having a rim portion thereon, a casing consisting of a plastic synthetic transparent material in contact with the rim of the base plate, said casing forming the cover of the housing and enclosing a clock movement and electromagnet in dustproof condition, said rim of the base plate having slits therein through which supply arms for the electromagnet pass, the dished member being provided with a molded and inwards extending socket as a seat for supporting the electromagnet and the rim portion Supporting the casing, a lug on said casing, a corresponding lug on said dished member, said rim portion extending to said lugs and the latter defining a slot between the base plate and thecasing and in said housing through which a pointer projects having a free end thereof extending into said slot, and a dustplate carried by the pointer and resiliently urged against the inside of the base plate and the casing at the base of the lugs.

References Cited in the file of this patent UNITED STATES PATENTS 1,439,429 Lyhne Dec. 19, 1922 2,453,865 Schmidt Nov. 16, 1948 2,519,713 Steinmann Aug. 22, 1950 FOREIGN PATENTS 289,479 Great Britain Aug. 23, 1928 309,636 Switzerland Nov. 16, 1955 

